Demand Flashcards

1
Q

Define demand:

A

The quantity of a good or service that consumers are willing and able to buy at any given price over a given time period

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2
Q

What is a contraction in demand

A

Where price increases so quantity demanded decreases

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3
Q

What is an extension in demand

A

Where price decreases so quantity demanded increases

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4
Q

Define: PED

A

A measure of the responsiveness of quantity demanded of a good following a change in price

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5
Q

PED equation

A

% change in QD / % change in P

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6
Q

Percentage change calculation

A

% change = ((New - Original) / Original) x 100

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7
Q

PED is always ___________

A

Negative

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8
Q

If PED is greater than 1 then it is considered ____________

A

Elastic

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9
Q

If PED is smaller than 1 then it is considered ____________

A

Inelastic

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10
Q

What does elastic mean

A

Elastic means that consumers respond a lot to a change in price

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11
Q

What does inelastic mean

A

Inelastic means that consumers respond less to a change in price

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12
Q

PED of 1 =

A

Unitary Price Elasticity

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13
Q

What does unitary price elasticity mean

A

That price and quantity change the same amount

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14
Q

Elastic demand curve is ___________

A

Horizontal

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15
Q

Inelastic demand curve is ___________

A

Verticle

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16
Q

What is the shape of unitary price elasticity

A

Curved (Like the first half of a U)

17
Q

Factors which influence PED

A

NASBIT

  1. Necessity
  2. Addiction / habits
  3. Substitutes
  4. Brand loyalty
  5. Proportion of Income
  6. Time period
18
Q

Necessities are ____________ while luxuries are ____________

A

Necessities - Inelastic

Luxuries - Elastic

19
Q

Addictive goods are ___________

A

Inelastic

20
Q

Goods with many substitutes are ____________

Goods with few substitutes are ____________

A

Many substitutes - Elastic

Few substitutes - Inelastic

21
Q

Strong brand loyalty - ____________

Weak brand loyalty - _____________

A

Strong brand loyalty - Inelastic

Weak brand loyalty - Elastic

22
Q

High proportion of income - _____________

Low proportion of income - _____________

A

High proportion of income - Elastic

Low proportion of income - Inelastic

23
Q

Goods are ___________ in the short run

A

Short run - Inelastic

24
Q

Goods are __________ in the long run

A

Long run - Elastic

25
Q

Profit =

A

Total revenue = Total cost

26
Q

Total revenue =

A

Price x quantity

27
Q

How to increase revenue on an inelastic PED

A

Increase price

28
Q

How to increase revenue on an elastic PED

A

Decrease price

29
Q

Income elasticity of demand equation

A

% change in qd / % change in income

30
Q

Inferior goods have a __________ YED

A

Negative

31
Q

What is a normal good

A

Goods for which demand increases when income increases

32
Q

What is an inferior good

A

Goods for which demand falls when income increases

33
Q

XED equation

A

% change in quantity demanded / % change in price

34
Q

Substitutes have a __________ XED

A

Substitutes - positive

35
Q

Complements have a ____________ XED

A

Negative

36
Q

The higher the number of the XED, the ________ the 2 goods

A

Closer

37
Q

XED formula

A

% change in qd of good X / % change in price of good Y